/**
* Test whether a specified node is visible in the logical view of a TreeWalker or NodeIterator.
* This function will be called by the implementation of TreeWalker and NodeIterator; it is not
* intended to be called directly from user code.
*
* @param n The node to check to see if it passes the filter or not.
* @return a constant to determine whether the node is accepted, rejected, or skipped, as defined
* above .
*/
public short acceptNode(int n, XPathContext xctxt) {
try {
xctxt.pushCurrentNode(n);
xctxt.pushIteratorRoot(m_context);
if (DEBUG) {
System.out.println("traverser: " + m_traverser);
System.out.print("node: " + n);
System.out.println(", " + m_cdtm.getNodeName(n));
// if(m_cdtm.getNodeName(n).equals("near-east"))
System.out.println("pattern: " + m_pattern.toString());
m_pattern.debugWhatToShow(m_pattern.getWhatToShow());
}
XObject score = m_pattern.execute(xctxt);
if (DEBUG) {
// System.out.println("analysis: "+Integer.toBinaryString(m_analysis));
System.out.println("score: " + score);
System.out.println("skip: " + (score == NodeTest.SCORE_NONE));
}
// System.out.println("\n::acceptNode - score: "+score.num()+"::");
return (score == NodeTest.SCORE_NONE) ? DTMIterator.FILTER_SKIP : DTMIterator.FILTER_ACCEPT;
} catch (javax.xml.transform.TransformerException se) {
// TODO: Fix this.
throw new RuntimeException(se.getMessage());
} finally {
xctxt.popCurrentNode();
xctxt.popIteratorRoot();
}
}
/**
* Returns the next node in the set and advances the position of the iterator in the set. After a
* NodeIterator is created, the first call to nextNode() returns the first node in the set.
*
* @return The next <code>Node</code> in the set being iterated over, or <code>null</code> if
* there are no more members in that set.
*/
public int nextNode() {
if (m_foundLast) return DTM.NULL;
int next;
com.sun.org.apache.xpath.internal.VariableStack vars;
int savedStart;
if (-1 != m_stackFrame) {
vars = m_execContext.getVarStack();
// These three statements need to be combined into one operation.
savedStart = vars.getStackFrame();
vars.setStackFrame(m_stackFrame);
} else {
// Yuck. Just to shut up the compiler!
vars = null;
savedStart = 0;
}
try {
if (DEBUG) System.out.println("m_pattern" + m_pattern.toString());
do {
next = getNextNode();
if (DTM.NULL != next) {
if (DTMIterator.FILTER_ACCEPT == acceptNode(next, m_execContext)) break;
else continue;
} else break;
} while (next != DTM.NULL);
if (DTM.NULL != next) {
if (DEBUG) {
System.out.println("next: " + next);
System.out.println("name: " + m_cdtm.getNodeName(next));
}
incrementCurrentPos();
return next;
} else {
m_foundLast = true;
return DTM.NULL;
}
} finally {
if (-1 != m_stackFrame) {
// These two statements need to be combined into one operation.
vars.setStackFrame(savedStart);
}
}
}
